A FORTRAN computer program applying the ultimate strength/instantaneous center
of rotation method was written to generate the eccentricity coefficients used for the
study of this project.

For single line bolted connections, the value of the eccentricity coefficient is determined
by several independent variables: NR (number of rows in the bolted connection), B
(distance between two adjacent bolts in a vertical column), Xo (horizontal distance from
centroid to applied load), and 0 (the load angle). From the relationships between the
eccentricity coefficient and the independent variables, it was observed that a mathematical
model of the eccentricity coefficient with respect to the independent variables is hard
to determine. Hence, statistical equations for predicting the eccentricity coefficients were
developed by using the Buckingham's PI-Theorem and regression analysis. The precision
of the statistical equations is discussed, and several ways to improve the precision are
presented in this paper.